<template>
  <div>
    <!-- 面包屑导航区 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>商品列表</el-breadcrumb-item>
      <el-breadcrumb-item>添加商品</el-breadcrumb-item>
    </el-breadcrumb>

    <el-card>
      <!-- 提示区域 -->
      <el-alert title="添加商品信息" type="info" show-icon center :closable="false"></el-alert>
      <!-- 步骤条 -->
      <el-steps :space="200" :active="active - 0" finish-status="success" align-center>
        <el-step title="基本信息"></el-step>
        <el-step title="商品参数"></el-step>
        <el-step title="商品属性"></el-step>
        <el-step title="商品图片"></el-step>
        <el-step title="商品内容"></el-step>
        <el-step title="完成"></el-step>
      </el-steps>

      <el-form :model="addForm" :rules="addFormRules" ref="addFormRef" label-width="100px" label-position="top">
        <el-tabs :tab-position="'left'" v-model="active" :before-leave="activeTabLeave" @tab-click="tabClicked">
          <el-tab-pane label="基本信息" name='0'>
            <el-form-item label="商品名称" prop="goods_name">
              <el-input v-model="addForm.goods_name"></el-input>
            </el-form-item>
            <el-form-item label="商品价格" prop="goods_price">
              <el-input v-model="addForm.goods_price" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品数量" prop="goods_number">
              <el-input v-model="addForm.goods_number" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品重量" prop="goods_weight">
              <el-input v-model="addForm.goods_weight" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品分类" prop="goods_weight">
              <el-cascader v-model="addForm.goods_cat" :options="cateList" :props="{ expandTrigger: 'hover' ,...catePorps}" @change="handleChange"></el-cascader>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品参数" name='1'>
            <el-form-item :label="item.attr_name" v-for="item in manyTableData" :key="item.attr_id">
              <el-checkbox-group v-model="item.attr_vals">
                <el-checkbox :label="item" v-for="item,index in item.attr_vals" :key="index" border></el-checkbox>
              </el-checkbox-group>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品属性" name='2'>
            <el-form-item :label="item.attr_name" v-for="(item) in onlyTableData" :key="item.attr_id">
              <el-input v-model="item.attr_vals"></el-input>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品图片" name='3'>
            <el-upload :on-success="handleSuccess" :headers="headerObj" :action="uploadUrl" :on-preview="handlePreview" :on-remove="handleRemove" list-type="picture">
              <el-button size="small" type="primary">点击上传</el-button>
            </el-upload>
          </el-tab-pane>
          <el-tab-pane label="商品内容" name='4'>
            <quill-editor v-model="addForm.goods_introduce"></quill-editor>
            <el-button type="primary" class="addBtn" @click="add">添加商品</el-button>
          </el-tab-pane>
        </el-tabs>
      </el-form>
    </el-card>

    <el-dialog :visible.sync="dialogVisible" width="50%">
      <img :src="previewPath">
    </el-dialog>
  </div>
</template>

<script>
import _ from "lodash";
export default {
  data() {
    return {
      dialogVisible: false,
      manyTableData: [],
      onlyTableData: [],
      active: "0",
      addForm: {
        goods_name: "",
        goods_price: "0",
        goods_number: "0",
        goods_weight: "0",
        goods_cat: [],
        pics: [],
        goods_introduce: "",
        attrs: [],
      },
      cateList: [],
      addFormRules: {
        goods_name: [
          { required: true, message: "请输入商品名称", trigger: "blur" },
        ],
        goods_price: [
          { required: true, message: "请输入商品价格", trigger: "blur" },
        ],
        goods_number: [
          { required: true, message: "请输入商品数量", trigger: "blur" },
        ],
        goods_weight: [
          { required: true, message: "请输入商品重量", trigger: "blur" },
        ],
        goods_cat: [
          { required: true, message: "请选择商品分类", trigger: "blur" },
        ],
      },
      catePorps: {
        label: "cat_name",
        value: "cat_id",
        children: "children",
      },
      headerObj: {
        Authorization: sessionStorage.getItem("token"),
      },
      previewPath: "",

      uploadUrl: "http://127.0.0.1:8888/api/private/v1/upload",
    };
  },
  methods: {
    async getCateList() {
      const { data } = await this.$http.get(`categories`);
      if (data.meta.status !== 200) {
        return this.$message.error("获取商品分类参数失败");
      }
      this.cateList = data.data;
    },
    handleChange() {
      if (this.addForm.goods_cat.length != 3) {
        this.addForm.goods_cat = [];
      }
    },
    activeTabLeave(activeName, oldActive) {
      if ((oldActive = "0" && this.addForm.goods_cat.length != 3)) {
        this.$message.error("请先选择商品分类");
        return false;
      }
    },
    async tabClicked() {
      if (this.active === "1") {
        const { data } = await this.$http.get(
          `categories/${this.catId}/attributes`,
          {
            params: { sel: "many" },
          }
        );
        if (data.meta.status != 200) {
          return this.$message.error("获取商品参数列表失败");
        }
        data.data.forEach((item) => {
          item.attr_vals =
            item.attr_vals.length === 0 ? [] : item.attr_vals.split(" ");
        });
        this.manyTableData = data.data;
      } else if (this.active === "2") {
        this.$http
          .get(`categories/${this.catId}/attributes`, {
            params: { sel: "only" },
          })
          .then((res) => {
            this.onlyTableData = res.data.data;
          })
          .catch(() => {
            this.$message.error("获取商品属性列表失败");
          });
      }
    },
    handlePreview(file) {
      this.previewPath = file.response.data.url;
      console.log(file);
      this.dialogVisible = true;
    },
    handleRemove(file) {
      const filePath = file.response.data.tmp_path;
      const index = this.addForm.pics.findIndex((x) => x.pic === filePath);
      this.addForm.pics.splice(index, 1);
    },
    handleSuccess(response) {
      const picInfo = { pic: response.data.tmp_path };
      this.addForm.pics.push(picInfo);
    },
    add() {
      this.$refs.addFormRef.validate((valid) => {
        if (!valid) return this.$message.error("请填写必要的表单项");
        const form = _.cloneDeep(this.addForm);
        form.goods_cat = form.goods_cat.join(",");
        // 动态参数
        this.manyTableData.forEach((item) => {
          const newInfo = {
            attr_id: item.attr_id,
            attr_value: item.attr_vals.join(" "),
          };
          this.addForm.attrs.push(newInfo);
        });
        // 静态属性
        this.onlyTableData.forEach((item) => {
          const newInfo = {
            attr_id: item.attr_id,
            attr_value: item.attr_vals,
          };
          this.addForm.attrs.push(newInfo);
        });
        form.attrs = this.addForm.attrs;
        this.$http
          .post(`goods`, form)
          .then((res) => {
            this.$message.success("商品添加成功");
            this.$router.push("/goods");
          })
          .catch(() => {
            this.$message.error("商品添加失败");
          });
      });
    },
  },
  created() {
    this.getCateList();
  },
  computed: {
    catId() {
      if (this.addForm.goods_cat.length === 3) {
        return this.addForm.goods_cat[2];
      }
      return null;
    },
  },
};
</script>
<style lang="less" scoped>
.el-cascader {
  width: 200px;
}
.el-checkbox {
  margin: 0 10px 0 0 !important;
}
.addBtn {
  margin-top: 20px;
}
</style>